JP2020029681A - Guide rail structure for shutter - Google Patents

Abstract

To provide a guide rail structure for a shutter which is capable of suppressing abnormal noise caused by sliding contact between a guide rail and a hook part.SOLUTION: A guide rail structure for a shutter includes: a plurality of slats 21 engaged with each other at their long side parts in the longitudinal direction to constitute a planar shutter curtain 23; a pair of slip-off preventing members 31 whose both ends are fixed with neck parts 45 that extend in the lengthwise direction in a projected manner at both ends of each slat 21, the neck parts 45 being formed such that their tips in the projection direction have hook parts 47 projecting in the thickness direction of the shutter curtain 23; and a pair of aluminum guide rails 33 having grooves 59 fixed to the right and left sides of an opening 13 and sandwiching edges 53 on both sides of the shutter curtain 23 from the thickness direction, each groove 59 being formed with a pair of retaining pieces 67 for retaining the hook part 47 by retaining the neck part 45, each groove 59 being formed such that a groove bottom 51 thereof is formed with a projecting line 69 which is continuous with the elevating direction in a direction in which the hook part 47 is in sliding contact with a tip end surface 49 on the opposite side of the neck part 45.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a guide rail structure for a shutter.

  A shutter curtain of a building shutter is configured by connecting a plurality of slats, which are components of a shutter curtain, in series. This slat is inserted into the end in the direction perpendicular to the continuous direction with the end of a hook member which is engaged with a guide rail on which the edge of the shutter curtain is guided to prevent the shutter curtain from coming off from the guide rail. Has been fixed.

JP-A-11-294038

  However, at the time of opening and closing the shutter curtain, when the guide state of the slat curtain is distorted with respect to the guide rail on the edge side, or when the slats are unbalanced, that is, when the relative displacement of the adjacent slats in the longitudinal direction occurs, the guide rails are moved. The groove bottom may come into contact with the tip surface of the hook member. When the front end surface of the hook member and the groove bottom of the guide rail are in sliding contact with each other, the contact area is large, so that the friction is increased and abnormal noise is easily generated.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a shutter guide rail structure capable of suppressing abnormal noise caused by sliding contact between a guide rail and a hook portion.

Next, means for solving the above problems will be described with reference to the drawings corresponding to the embodiments.
The guide rail structure for a shutter according to claim 1 of the present invention has a planar shape which is formed in a long and substantially rectangular plate shape and a plurality of which are engaged with each other at long sides along the longitudinal direction to move up and down the opening 13. A slat 21 forming a shutter curtain 23,
A neck portion 45 protrudes along the longitudinal direction and is fixed to both ends of the slats 21 every predetermined number of sheets, and has a hook portion 47 protruding in a thickness direction of the shutter curtain 23 at a leading end of the neck portion 45 in a protruding direction. A pair of retaining members 31 formed in a T-shape in plan view;
It has a U-shaped groove 59 extending in the vertical direction and fixed to the left and right of the opening 13 and sandwiching the edges 53 on both sides of the shutter curtain 23 in the thickness direction. A pair of retaining pieces 67 for retaining the hook portion 47 with the neck portion 45 therebetween are formed, and a tip end surface 49 opposite to the neck portion 45 with the hook portion 47 interposed between the groove bottoms 51 of the groove 59. A pair of aluminum guide rails 33 in which ridges 69 that slide in contact with each other are formed continuously along the elevating direction;
It is characterized by having.

In this shutter guide rail structure, the retaining members 31 are fixed to both ends of the slat 21 in the longitudinal direction. The retaining member 31 is inserted into the groove 59 of the guide rail 33. The retaining member 31 inserted into the groove 59 is retained by the hook portion 47 being hooked by a pair of retaining pieces 67 provided on both sides of the neck portion 45 inside the groove 59. That is, the stopper prevents the edge 53 of the slat 21 from moving out of the groove 59. As a result, the shutter curtain 23 is prevented from coming off from the guide rail 33.
In the guide rail structure for a shutter, a ridge 69 is formed continuously on the groove bottom 51 of the guide rail 33 in the vertical direction. The ridge 69 abuts on the distal end surface 49 of the retaining member 31. The ridge 69 is formed such that the width in the thickness direction of the shutter curtain 23 is sufficiently smaller than the width in the same direction on the distal end surface 49 of the retaining member 31. Accordingly, the contact area of the retaining member 31 with the groove bottom 51 is smaller than that in the case where the convex ridge 69 is not provided. The retaining member 31 having a small contact area with the groove bottom 51 has a convex streak 69 even when the front end surface 49 slides on the groove bottom 51 when the shutter curtain 23 moves up and down. It is smaller than a non-structure. That is, generation of abnormal noise is suppressed.

The shutter guide rail structure according to claim 2 of the present invention is the shutter guide rail structure according to claim 1,
A tip surface 49 of the hook portion 47 is formed as a convex curved surface.

  In this shutter guide rail structure, when the slat 21 moves in the direction of entering the groove 59 of the guide rail 33, the convex curved surface formed on the distal end surface 49 of the retaining member 31 hits the convex ridge 69 of the groove bottom 51. The convex curved surface is, for example, an arc surface having the vertical axis as a central axis. When the shutter curtain 23 bends inward and outward at the opening 13 at the center in the longitudinal direction due to, for example, wind pressure, the end of the slat 21 is inclined in the groove. At this time, since the tip end surface 49 is formed of a convex curved surface, the retaining member 31 is separated at both ends (corners) in the thickness direction from the groove bottom 51 as compared with the case where the tip end surface 49 is formed of a flat surface. Easier to do. That is, the slat 21 can keep the tip surface 49 of the retaining member 31 in contact with only the ridge 69 even if the end is inclined.

The guide rail structure for a shutter according to claim 3 of the present invention is the guide rail structure for a shutter according to claim 1 or 2,
The guide rail 71 has a double structure in which a steel reinforcing member 73 formed in a U-shape in plan view is fitted inside the groove 59, and the pair of retaining pieces 67 is The reinforcing member 73 is formed integrally with the inner surface of the member 73, and the ridge 69 is formed on the groove bottom 51 of the reinforcing member 73.

  In the shutter guide rail structure, a steel reinforcing member 73 also formed in a U-shape in a plan view is fitted into a groove 59 of an aluminum guide rail 71 formed in a U-shape in a plan view. Thus, the fire resistance of the guide rail 71 is enhanced. In this case, the pair of retaining pieces 67 and the ridges 69 are not formed in the grooves 59 on the aluminum guide rail 71. The pair of retaining pieces 67 and the ridges 69 are formed on a steel reinforcing member 73 that fits inside the groove 59 of the guide rail 71. Thereby, even in the guide rail for a fireproof shutter with improved fireproof performance, the contact area of the retaining member 31 with the groove bottom 51 of the reinforcing member 73 is smaller than that in the case where the ridge 69 is not provided. The retaining member 31 having a small contact area with the groove bottom 51 of the reinforcing member 73 has a friction generated even when the front end surface 49 slides on the groove bottom 51 of the reinforcing member 73 when the shutter curtain 23 moves up and down. The size is smaller than that of the structure without the ridge 69.

  According to the guide rail structure for a shutter according to the first aspect of the present invention, since the protrusion is formed at the groove bottom of the guide rail, abnormal noise caused by sliding contact between the guide rail and the hook portion can be suppressed.

  According to the guide rail structure for a shutter according to claim 2 of the present invention, even when the slat is bent inward and outward of the opening, the tip surface can be hardly in contact with the groove bottom. Even if the end is inclined, the tip end surface of the retaining member can maintain contact with only the ridge.

  According to the guide rail structure for a shutter according to claim 3 of the present invention, a steel reinforcing member is fitted inside an aluminum guide rail, and a double-layered guide rail for a fireproof shutter having improved fire resistance. In this case as well, abnormal noise caused by sliding contact between the guide rail and the hook portion can be suppressed.

It is a perspective view showing the appearance of the shutter device provided with the guide rail structure for shutters concerning a 1st embodiment. FIG. 2 is a plan sectional view near one guide rail shown in FIG. 1. It is operation | movement explanatory drawing at the time of a slat moving. It is a plane sectional view near one guide rail in a guide rail structure for shutters concerning a 2nd embodiment. It is operation | movement explanatory drawing at the time of the slat of 2nd Embodiment moving. It is a plane sectional view near the one guide rail in the guide rail structure for shutters concerning a 3rd embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[First Embodiment]
FIG. 1 is a perspective view illustrating an appearance of a shutter device 11 including a guide rail structure for a shutter according to the first embodiment.
The shutter guide rail structure according to the first embodiment can be suitably used, for example, for a shutter device 11 that covers an opening 13 of a house. An opening 13 is provided on the outer wall 15 of the house. A sash window 17 is attached to the opening 13. The shutter device 11 is attached outside the sash window 17.

  The shutter device 11 has a shutter storage portion 19 attached above the opening 13. A shutter curtain 23 formed by connecting a plurality of slats 21 can be accommodated in the shutter accommodating portion 19. The shutter curtain 23 has a seat plate 25 at the end in the feeding direction. A shutter (not shown) that winds and unwinds the shutter curtain 23 is provided in the shutter storage unit 19. The shutter curtain 23 is opened and closed by moving up and down the opening 13 by being wound and fed out by a switch.

  On the left and right outer sides of the sash window 17, a pair of long outer frames 27 whose upper ends are connected to the storage portion hang down with the vertical direction as the extending direction. The outer frame 27 is fixed to the outer wall 15. The lower ends of the pair of outer frames 27 are connected by left and right ends of a lower frame 29 extending below in a lateral direction and located below the sash window 17.

  For the outer frame 27 and the lower frame 29, an extruded product made of an aluminum alloy or the like can be used. Since the outer frame 27 and the lower frame 29 are made of an aluminum alloy, they can have design properties and rust prevention.

FIG. 2 is a plan sectional view showing the vicinity of one guide rail shown in FIG.
The guide rail structure for a shutter according to the first embodiment has a slat 21, a retaining member 31, and a guide rail 33 as main components.

  The outer frame 27 is formed by connecting an outer plate 37 having an L-shaped claw portion 35 and an inner plate 41 having a screw portion 39 with a base plate 43. The base plate 43 of the outer frame 27 is fixed to the outer wall 15 by a frame fixing screw (not shown). The outer frame 27 has an opening between the outer plate 37 and the inner plate 41, and the guide rail 33 is attached to the opening.

  The slat 21 is formed in a long and substantially rectangular plate shape. The slats 21 constitute a planar shutter curtain 23 in which a plurality of the slats 21 are engaged with each other at the long sides along the longitudinal direction to move up and down the opening 13. The shutter curtain 23 covers the opening 13 by ascending and descending outside the outer wall 15. That is, the shutter curtain 23 covers the sash window 17 from outside the outer wall 15. The shutter curtain 23 has a seat plate 25 attached to the leading end in the operating direction. The seat plate 25 is seated on the lower frame 29 when the shutter curtain 23 is lowered. The slats 21 constituting the shutter curtain 23 are made of aluminum or steel.

  The neck members 45 of the retaining members 31 are fixed to both ends of the slats 21 every predetermined number of sheets along the longitudinal direction. The retaining member 31 has a hook portion 47 projecting in the thickness direction of the shutter curtain 23 at the distal end of the neck portion 45 in the projecting direction. The retaining member 31 has a T-shape in plan view due to the shape in which the hook portion 47 is continuous with the neck portion 45.

  The hook portion 47 has a distal end surface 49 opposite to the neck portion 45 and is formed of a convex curved surface. The convex curved surface is, for example, an arc surface that projects toward the groove bottom 51 with the vertical direction as the central axis.

  The guide rails 33 extend in the vertical direction to the left and right of the opening 13 and are fixed to the respective outer frames 27. Each guide rail 33 sandwiches the edges 53 on both sides of the shutter curtain 23 from the thickness direction (vertical direction in FIG. 2). Each guide rail 33 is formed in a substantially h-shaped cross section having a groove 59 opened to the opening 13 by a surface plate portion 55 and an L-shaped plate portion 57 projecting from the surface plate portion 55 to the indoor side. . FIG. 2 shows a guide rail 33 that is on the left hand side when facing from indoors to outdoors. Although not shown, the right guide rail 33 has a configuration in which the guide rail 33 shown in FIG.

  The surface plate 55 has an engagement recess 61 at an end opposite to the opening 13. The engagement concave portion 61 engages with the L-shaped claw portion 35 formed on the outer frame 27. The surface plate portion 55 has a silence band mounting groove 63 at an end opposite to the engagement concave portion 61.

  The L-shaped plate portion 57 has a silence band mounting groove 63 at an end opposite to the engagement concave portion 61. That is, a pair of the sound deadening band mounting grooves 63 are provided with the groove 59 interposed therebetween. A silence band (not shown) such as mohair is attached to each of the pair of silence band attachment grooves 63. In the L-shaped plate portion 57, a screw penetrating piece 65 is formed on the opposite side of the silence band mounting groove 63. The screw penetrating piece 65 is fixed to a screwing portion 39 formed at the end of the outer frame 27 on the side opposite to the L-shaped claw portion 35 with screws. The outer frame 27 and the guide rail 33 are integrally fixed by the L-shaped claw portion 35 and the engaging concave portion 61 being engaged, and the screw penetrating piece 65 and the screwing portion 39 being fastened by screws.

  The guide rail 33 has a U-shaped groove 59 in a plan view, and a pair of retaining pieces 67 for retaining the hook portion 47 with the neck portion 45 of the slat 21 interposed therebetween are formed in the groove 59.

  In the guide rail 33, a ridge 69 slidably in contact with a distal end surface 49 opposite to the neck 45 with the hook 47 interposed therebetween is continuously formed in the groove bottom 51 of the groove 59 along the vertical direction. The guide rail 33 can be manufactured as an extruded product made of aluminum. The protruding ridges 69 are easily formed at the same time as the extrusion of the guide rail 33 without additional processing, by providing a molded portion having the same cross-sectional shape to the shape of the die used for the extrusion of the guide rail 33. can do.

Next, the operation of the above configuration will be described.
FIG. 3 is an operation explanatory diagram when the slat 21 moves.
In the shutter guide rail structure according to the first embodiment, a plurality of slats 21 are engaged with each other at long sides thereof to form a planar shutter curtain 23. In the shutter curtain 23, the edges 53 on both sides are sandwiched by grooves 59 of the guide rail 33 provided on the left and right of the opening 13, and the ascending and descending is guided. Each of the slats 21 has a windable surface shape by an engagement structure in which long sides are inserted into each other from the longitudinal direction and swings around a horizontal engagement axis. Here, the individual slats 21 can be relatively moved in the longitudinal direction with respect to the opposing slats vertically adjacent in the vertical direction.

  The slats 21 have retaining members 31 fixed to both ends in the longitudinal direction. The retaining member 31 is inserted into the groove 59 of the guide rail 33. The retaining member 31 inserted into the groove 59 is retained inside the groove 59 by the hook portion 47 being hooked by a pair of retaining pieces 67 provided with the neck 45 interposed therebetween. That is, the retaining member 31 regulates the movement of the slat 21 in the direction in which the edge 53 of the slat 21 comes out of the groove 59. On the other hand, when each of the slats 21 which can be relatively moved in the longitudinal direction moves in the direction of entering the groove 59 (the direction of the arrow a in FIG. 3), one of the retaining members 31 provided at both ends becomes the groove 59. At the bottom of the groove 51. This is because the end surface of the slat 21 is set such that the distal end surface 49 of the retaining member 31 contacts the groove bottom 51 before contacting the retaining piece 67. This prevents the end of the aluminum slat 21 from slidingly contacting the metal retaining piece 67.

  The retaining member 31 is generally formed of a resin material. Even when the tip surface 49 slides on the groove bottom 51, the retaining member 31 generates less noise than the sliding contact between metals in which the end of the slat 21 slides on the retaining piece 67.

  In the guide rail structure for the shutter, a ridge 69 is formed continuously on the groove bottom 51 of the guide rail 33 in the elevating direction. The ridge 69 abuts on the distal end surface 49 of the retaining member 31. The ridge 69 is formed such that the width in the thickness direction of the shutter curtain 23 is sufficiently smaller than the width in the same direction on the distal end surface 49 of the retaining member 31. Accordingly, the contact area of the retaining member 31 with the groove bottom 51 is smaller than that in the case where the convex ridge 69 is not provided. The retaining member 31 having a small contact area with the groove bottom 51 has a structure in which the generated friction does not have the ridge 69 even when the front end surface 49 slides on the groove bottom 51 when the shutter curtain 23 moves up and down. It is even smaller than.

  Further, in this shutter guide rail structure, when the slat 21 moves in the direction of entering the groove 59 of the guide rail 33, the convex curved surface formed on the distal end surface 49 of the retaining member 31 becomes the convex ridge 69 of the groove bottom 51. Hit. The convex curved surface is, for example, an arc surface having the vertical axis as a central axis. When the shutter curtain 23 bends inward and outward at the opening 13 at the center in the longitudinal direction due to, for example, wind pressure, the end of the slat 21 is inclined in the groove. At this time, since the tip end surface 49 is formed as a convex curved surface, the retaining member 31 is separated from the groove bottom 51 at both ends (corners) in the thickness direction as compared with the case where the stopper member 31 is formed as a flat surface. Easier to do. That is, the slat 21 can keep the tip surface 49 of the retaining member 31 in contact with only the ridge 69 even if the end is inclined. As a result, even when the slats 21 bend inward and outward of the opening 13, the tip surface 49 can be less likely to contact the groove bottom 51.

[Second embodiment]
Next, a second embodiment will be described.
FIG. 4 is a plan sectional view showing the vicinity of one guide rail in the shutter guide rail structure according to the second embodiment. In the second embodiment, the same reference numerals are given to members / parts equivalent to the members / parts shown in the first embodiment, and redundant description will be omitted.
The guide rail structure for the shutter can be configured as a double structure in which the guide rail 71 fits a steel reinforcing member 73 formed in a U-shape in plan view inside the groove 59. In this case, the pair of retaining pieces 67 are integrally formed on the inner surface of the reinforcing member 73. Each retaining piece 67 can be formed by subjecting the groove side wall of the reinforcing member 73 to processing such as bending. Further, the protruding ridges 69 can be formed by subjecting the groove bottom 51 of the reinforcing member 73 to processing such as overhang.

  In the guide rail 71, a locking groove 75 is formed between the surface plate portion 55 and the silence band mounting groove 63. One opening edge sandwiching the groove 59 of the reinforcing member 73 is inserted into the locking groove 75. The reinforcing member 73 has one opening edge inserted into the locking groove 75, and the other opening edge contacts a tapered surface 77 formed on the inner surface of the guide rail 71, and the detachment from the groove 59 is regulated.

  In this double structure, since the rivet or the like for fixing the guide rail 71 and the reinforcing member 73 does not protrude into the inside of the groove 59, generation of abnormal noise due to interference of the retaining member 31 and the slat 21 with the rivet or the like. Can be prevented. The shutter guide rail structure having a double structure in which the reinforcing member 73 is fitted inside the guide rail 71 can be used as a guide rail for a fireproof shutter.

Next, the operation of the above configuration will be described.
FIG. 5 is an operation explanatory diagram when the slat 21 of the second embodiment moves.
In the shutter guide rail structure, a steel reinforcing member 73 also formed in a U-shape in a plan view is fitted into a groove 59 of an aluminum guide rail 71 formed in a U-shape in a plan view. Thus, the fire resistance of the guide rail 71 is enhanced.

  In this case, the pair of retaining pieces 67 and the ridges 69 are not formed in the groove 59 on the aluminum guide rail 71. The pair of retaining pieces 67 and the ridges 69 are formed on a steel reinforcing member 73 that fits inside the groove 59 of the guide rail 71. Thereby, even in the guide rail for a fireproof shutter with improved fireproof performance, the contact area of the retaining member 31 with the groove bottom 51 of the reinforcing member 73 is smaller than that in the case where the ridge 69 is not provided. The retaining member 31 having a small contact area with the groove bottom 51 of the reinforcing member 73 has a friction generated even when the front end surface 49 slides on the groove bottom 51 of the reinforcing member 73 when the shutter curtain 23 moves up and down. The size is smaller than that of the structure without the ridge 69.

  As a result, a steel reinforcing member 73 is fitted inside the guide rail 71 made of aluminum, and the slide rail between the guide rail 71 and the hook portion 47 is also provided in the guide rail for a fire-retardant shutter having a double structure with improved fire resistance. Abnormal noise caused by contact can be suppressed.

[Third Embodiment]
Next, a third embodiment will be described.
FIG. 6 is a plan sectional view showing the vicinity of one guide rail in the shutter guide rail structure according to the third embodiment. In the third embodiment, the same reference numerals are given to members / parts equivalent to the members / parts shown in the first embodiment and the second embodiment, and overlapping description is omitted. .
The guide rail structure for the shutter has a bent ridge 81 formed on the inner wall portion of the reinforcing member sandwiched between one of the pair of retaining pieces 67 of the reinforcing member 79 on the building side and the groove bottom 51. I do. In the reinforcing member 79, the bent ridges 81 protrude to the side opposite to the inside of the groove 59.

  On the other hand, the guide rail 83 has substantially the same shape as the guide rail 71 shown in the second embodiment, but has a guide rail inner wall portion sandwiched between the one retaining piece 67 and the groove bottom 51 on the building side, It has a concave portion 85.

  The reinforcing member 79 is fixed to the guide rail 83 by the locking groove 75 and the concave portion 85 by crimping and fixing the bent ridge portion 81 to the concave portion 85 of the guide rail 83. .

Next, the operation of the above configuration will be described.
In this shutter guide rail structure, similarly to the above configuration, a steel reinforcing member also formed in a U-shape in a groove 59 of an aluminum guide rail 83 formed in a U-shape in a plan view. 79 is fitted. Accordingly, the fire resistance of the guide rail 83 is enhanced. The pair of retaining pieces 67 and the ridges 69 are formed on a reinforcing member 79 made of steel, similarly to the above configuration. Therefore, even in the guide rail for a fireproof shutter with improved fireproof performance, the contact area of the retaining member 31 with the groove bottom 51 of the reinforcing member 79 is smaller than that in the case where the ridge 69 is not provided. The retaining member 31 having the contact area with the groove bottom 51 of the reinforcing member 79 reduced, even when the front end surface 49 slides on the groove bottom 51 of the reinforcing member 79 when the shutter curtain 23 moves up and down, friction generated. The size is smaller than that of the structure without the ridge 69. That is, generation of abnormal noise is suppressed.

  The reinforcing member 79 is provided on a reinforcing member inner wall portion sandwiched between one of the pair of retaining pieces 67 on the building side and the groove bottom 51, and a bent ridge projecting to the opposite side to the inside of the groove 59. A part 81 is formed. The bent ridge portion 81 is caulked and fixed to a concave portion 85 protruding on the side opposite to the inside of the groove 59 of the guide rail 83. That is, the bent ridge portion 81 and the concave portion 85 form a fixed portion 87 which is caulked with each other.

  When fixing the reinforcing member 79 to the guide rail 83, the guide rail for the fireproof shutter is often fixed to the groove bottom 51 of the guide rail 83 with a rivet or the like. However, when the guide rail 83 receives heat from a fire from the outside, melting of the guide rail 83 proceeds from the outside. The back surface of the groove bottom 51 of the guide rail 83 is the outdoor side. When the groove bottom 51 is melted, the reinforcing member 79 fixed to the groove bottom 51 of the guide rail 83 with a rivet is not fixed together with the melted guide rail 83. For this reason, the reinforcing member 79 cannot hold the slat 21 completely.

  On the other hand, in the guide rail for a fireproof shutter of the present embodiment, the position of the fixing portion 87 is set to a position close to the building side (indoor side) of the guide rail 83 that is relatively less susceptible to heat. Release of the holding of the slats 21 due to dissolution can be avoided. Further, since the fixing portion 87 caulks the bent ridge portion 81 from the inside toward the outside of the concave portion 85, it is possible to suppress the catch of the retaining member 31 in the elevating direction as compared with a fixing structure using rivets or the like. .

  As a result, the reinforcing member 79 made of steel is fitted to the inside of the guide rail 83 made of aluminum without using rivets by caulking from the inside of the bent ridge portion 81 to the outside concave portion 85, and Even in a fire-retardant shutter guide rail having a double structure with improved performance, abnormal noise caused by sliding contact between the guide rail 83 and the hook part 47 can be suppressed.

  Therefore, according to the shutter guide rail structure according to each of the above-described embodiments, it is possible to suppress abnormal noise caused by sliding contact between the guide rail 33 and the hook portion 47.

  The present invention is not limited to the above embodiments, and it is also possible for those skilled in the art to modify and apply the configurations of the embodiments to each other based on the description, the description, and the well-known techniques. The invention is intended to be included in the scope for which protection is sought.

  For example, in the above configuration example, in the above embodiment, an example in which the ridge is provided at the groove bottom is described, but the ridge may be formed on the tip end surface of the hook portion. Also in this case, the contact area can be reduced by contacting the ridge with the groove bottom, and it is possible to suppress the generation of abnormal noise.

DESCRIPTION OF SYMBOLS 13 ... Opening 21 ... Slat 23 ... Shutter curtain 31 ... Retaining member 45 ... Neck 47 ... Hook 49 ... Tip surface 51 ... Groove bottom 53 ... Edge 59 ... Groove 67 ... Retaining piece 69 ... Protrusion 71 ... Guide Rail 73 ... Reinforcing member

Claims (3)

A slat forming a planar shutter curtain that is formed in a long, substantially rectangular plate shape and engages a plurality of the long sides along the longitudinal direction and moves up and down the opening.
A neck portion protrudes along the longitudinal direction and is fixed to both ends of the predetermined number of the slats, and has a hook portion protruding in a thickness direction of the shutter curtain at a tip end of the neck portion in a protruding direction. A pair of retaining members formed on the
It has a U-shaped groove extending in the elevating direction and fixed to the left and right sides of the opening and sandwiching the edges on both sides of the shutter curtain from the thickness direction, and the groove sandwiches the neck. A pair of retaining pieces for retaining the hook portion are formed, and at the groove bottom of the groove, a convex ridge that slides on the tip surface opposite to the neck portion across the hook portion is continuous in the vertical direction. A pair of aluminum guide rails formed as
A guide rail structure for a shutter, comprising:   2. The guide rail structure for a shutter according to claim 1, wherein a tip end surface of the hook portion is formed as a convex curved surface. The guide rail has a double structure in which a steel reinforcing member formed in a U-shape in plan view is fitted inside the groove,
The pair of retaining pieces are integrally formed on the inner surface of the reinforcing member,
The guide rail structure for a shutter according to claim 1, wherein the ridge is formed at a groove bottom of the reinforcing member.

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